Analysis of Photovoltaic System Energy Performance Evaluation Method

Research output: NRELTechnical Report

Abstract

Documentation of the energy yield of a large photovoltaic (PV) system over a substantial period can be useful to measure a performance guarantee, as an assessment of the health of the system, for verification of a performance model to then be applied to a new system, or for a variety of other purposes. Although the measurement of this performance metric might appear to be straight forward, thereare a number of subtleties associated with variations in weather and imperfect data collection that complicate the determination and data analysis. A performance assessment is most valuable when it is completed with a very low uncertainty and when the subtleties are systematically addressed, yet currently no standard exists to guide this process. This report summarizes a draft methodology for anEnergy Performance Evaluation Method, the philosophy behind the draft method, and the lessons that were learned by implementing the method.
Original languageAmerican English
Number of pages64
DOIs
StatePublished - 2013

NREL Publication Number

  • NREL/TP-5200-60628

Keywords

  • energy
  • photovoltaic
  • test methods

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